Martina Zeleňáková (2018). SOURCES OF POLLUTION IN HORNAD WATERSHED. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 815-822. https://doi.org/10.5593/sgem2018/5.1/s20.105